Abstract
Free-standing, membrane-embedded, Si microwire arrays have been used to affect the solar-driven, unassisted splitting of HI into H2 and I3-. The Si microwire arrays were grown by a chemical-vapor-deposition vapor-liquid-solid growth process using Cu growth catalysts, with a radial n+p junction then formed on each microwire. A Nafion proton-exchange membrane was introduced between the microwires and Pt electrocatalysts were then photoelectrochemically deposited on the microwires. The composite Si/Pt-Nafion membrane was mechanically removed from the growth substrate, and Pt electrocatalysts were then also deposited on the back side of the structure. The resulting membrane-bound Si microwire arrays spontaneously split concentrated HI into H2(g) and I3- under 1 Sun of simulated solar illumination. The reaction products (i.e. H2 and I3-) were confirmed by mass spectrometry and ultraviolet-visible electronic absorption spectroscopy.
| Original language | English |
|---|---|
| Pages (from-to) | 1484-1492 |
| Number of pages | 9 |
| Journal | Energy and Environmental Science |
| Volume | 8 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 1 2015 |
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ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Environmental Chemistry
- Pollution
- Nuclear Energy and Engineering
Cite this
Unassisted solar-driven photoelectrosynthetic HI splitting using membrane-embedded Si microwire arrays. / Ardo, Shane; Park, Sang Hee; Warren, Emily L.; Lewis, Nathan S.
In: Energy and Environmental Science, Vol. 8, No. 5, 01.05.2015, p. 1484-1492.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Unassisted solar-driven photoelectrosynthetic HI splitting using membrane-embedded Si microwire arrays
AU - Ardo, Shane
AU - Park, Sang Hee
AU - Warren, Emily L.
AU - Lewis, Nathan S
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Free-standing, membrane-embedded, Si microwire arrays have been used to affect the solar-driven, unassisted splitting of HI into H2 and I3-. The Si microwire arrays were grown by a chemical-vapor-deposition vapor-liquid-solid growth process using Cu growth catalysts, with a radial n+p junction then formed on each microwire. A Nafion proton-exchange membrane was introduced between the microwires and Pt electrocatalysts were then photoelectrochemically deposited on the microwires. The composite Si/Pt-Nafion membrane was mechanically removed from the growth substrate, and Pt electrocatalysts were then also deposited on the back side of the structure. The resulting membrane-bound Si microwire arrays spontaneously split concentrated HI into H2(g) and I3- under 1 Sun of simulated solar illumination. The reaction products (i.e. H2 and I3-) were confirmed by mass spectrometry and ultraviolet-visible electronic absorption spectroscopy.
AB - Free-standing, membrane-embedded, Si microwire arrays have been used to affect the solar-driven, unassisted splitting of HI into H2 and I3-. The Si microwire arrays were grown by a chemical-vapor-deposition vapor-liquid-solid growth process using Cu growth catalysts, with a radial n+p junction then formed on each microwire. A Nafion proton-exchange membrane was introduced between the microwires and Pt electrocatalysts were then photoelectrochemically deposited on the microwires. The composite Si/Pt-Nafion membrane was mechanically removed from the growth substrate, and Pt electrocatalysts were then also deposited on the back side of the structure. The resulting membrane-bound Si microwire arrays spontaneously split concentrated HI into H2(g) and I3- under 1 Sun of simulated solar illumination. The reaction products (i.e. H2 and I3-) were confirmed by mass spectrometry and ultraviolet-visible electronic absorption spectroscopy.
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U2 - 10.1039/c5ee00227c
DO - 10.1039/c5ee00227c
M3 - Article
VL - 8
SP - 1484
EP - 1492
JO - Energy and Environmental Science
JF - Energy and Environmental Science
SN - 1754-5692
IS - 5
ER -